2011 numbers: Ranked second on team and fourth in Big Ten with 7.5 sacks, to go along with 64 tackles, 13.5 tackles for loss and a forced fumble. Named second-team All-Big Ten.

Why he's here: Teammate Whitney Mercilus got all the pub last year, and rightfully so after leading the nation in sacks and forced fumbles. But Buchanan quietly had a really fine year as well with his 7.5 sacks. Now, you could make the argument that Buchanan got free because offenses were concentrating on the Hendricks Award winner on the other side. But you could also say teams couldn't really load up against Mercilus because of Buchanan.

Truth is, they're both awfully good. Buchanan is a little bit different player, a long and lanky defensive end with a lot of athleticism. He's bulking up in an effort to get to 250 pounds by kickoff on Sept. 1. He could also drop back in coverage a little bit and use those long arms to his advantage. Now fully healed from a scary jaw injury this offseason, Buchanan could be eating up quarterbacks this fall. Don't be surprised if he becomes the new star of the Illini defense.